Originally Posted by sirmaru
Actually, both sync to and from the Amazon server, not directly to each other. I always press the sync button on each when starting and finishing with each device. If one does not do that, then the sync may be delayed until the server gets around to initiating the sync.
When pressing the sync button on the Kindle Keyboard, one must be sure the WiFi connection bars show first. They take a few seconds to show up. If one tries to sync it before the WiFi bars show, the Kindle Keyboard freezes.
I have no problem syncing to Kindle to Kindle just Kindle to Kindle Fire. This is a well known issue.